Bed support for lathes, grinders and the like



June 20, 1933e A, STORM ET AL 1,914,586

BED SUPPORT FOR LATI-IES, GRINDERS, AND THE LIKE Filed Feb. 18, 1931 -2 wat; z/agla 7013727 @of 7360119612 star TT @FFME ADOLPE. STRE AND THR THORSEN, F MINNEAPOLS, MNNESOTA, ASSIGNORS TO STGRIVI WANUFACTUREG CG., ENC., OF MNNEAPOLIS, MINNESOTA, A CORPORATION BED S''PEORT FOB LATI-IES, GRNEES AND LIKE Application. filed February 18, 1931. Serial N' 516,647.

Gur present invention relates to bed supports for lathes, grinders and the like and has for its object the provision of such a support that is self-adjusting to any .nneveniiess in a floor on which it rests, without placing torque on the bed of the inacliiiie that would tend to throw work therein out of alignment with the cutting tool. Further objects of the invention. will be apparent from the following description lThe above end, geiieially stated, the iiivention consists of the novel devices and combinations of devices hereinafter described and defined in the claims. 15 In the accompanying drawing, which illustrates the invention, like characters indicate like parts throughout the several views.

Referring to the drawing: Fig. 1 is a front elevation of a lathe hav- 20 ing the invention embodied therein;

2 is a left hand elevation of the lathe as shown in Fig. 1; n

Figs. 3 and 4 are fragmentary detail views, principally iii section tak-en on the 5 lines 3 3 and 444 of Fig. 1, on a larger scale;

Fig. 5 is a fragmentary perspective view, showing the upper end portion of the left 30 hand leg bracket;

Fig. G is a perspective view of the base block;

Fig. 7 is a fragmentary perspective view, showing the upper end portion of the right 5 hand leg bracket;

Fig. 8 is a perspective view of the upper bearing; and c Fig. 9 is a perspective view of the lower bearing. l i The invention as shown is embodied in a lathe especially designed for turning pistons for internal combustion enginesabut is equally well adapted for cylinder grinding machines and the like.

Of the parts of the lathe shown, the numeral 10 indicates its cast bed, and the numerals 11 and 12 indicate, respectively, the headstock base and the tailstock base. rlhe support for the bed 10 includes left and '50 right hand leg brackets 13 and 14 respectively, each of which is in the form of an A frame.

Each leg bracket 13 and 14 includes a pair of legs 15, and upper and lower cross-tie bars 16 and 17 respectively, and a wide horizontal web 18 which forms the top of said bracket. Each leg is in cross section in the forni of anangle and formed with the lower end thereof is an apertured flat foot 19 through which a lag screw, not shown, may be passed to fasten said leg to a floor X.

Supported on the tops of the leg brackets 13 and 14 is a shallow Asheet metal pan 2O rigidly secured thereto, and forms a connection therefor, as will presently appear. The leg brackets 13 and 14 are connected by a cross tie-rod 21, secured atv its ends to the crossstie bars 17, at the longitudinal centers thereof. l

The bed 10` is supported on the leg brackets v13 and 14 by a base block 22 and cooperating upper and lower cast bearings 23 and 24 respectively. Said base block 22 and the lower bearing 24 rest on the bottom of the pan 2O directly over the leg brackets 13 and 14 respectively, and are rigidly secured thereto by cap screws which extend through bores in said pan and rigidly secure the same to said legs. This pan 20 also acts as a connection between the leg brackets 13 and 14 and securely holds the same against vertical angular movement in respect to each other.

Cap screws rigidly secure the bed 10 to the base block 22 and to the upper bearing 23. The upper bearing 23 rests directly on the lower bearing 24 and there is a rocking joint 25 there between.. This joint 25 is formed by two short cylindrical bosses on the bearings 23 and 24, the latter of which has a. flat surface and the former of which has a spherical surface, which contacts with said 'Hat surface for` rocking movement thereon. The two bearings 23 and 24 are connected by a stud, as shown, a cap screw 26 which extends axially through the bosses on said bearings. rlhis cap screw 26 has threaded engagement with the upper bearing 23 and is loose in the bearing 24 to permit the required rocking movement of the leg bracket 24, in respect to the bed transversally thereof; see F ig. 4.

The bed 10 is a heavy cast structure suitably reinforced by ribs so that therel is no spring thereon that would affect the relative arrangement of the headstock and tailstock, and hence, the alignment of the work in respect to the cutting tool.

The leg bracket 13 and the bearings 28 and 21 afford a three-point support for the bed l0. It is evident that the leg bracket 14, due to the joint 25, is self-adjusting in respect to the bed 10 so that both of its legs 15 will rest on the floor X, although un- As previously stated, the pan Aforms a tie connection between the two leg brackets 13 and 14 and securely holds the latter from turning about the axis of the connection 26.

gp There is suilicient flexibility in the pan 20 to permit the necessary slight movement of the leg bracket 14, at the joint 25, in respect to the bed 10, and permit both of its feet to rest on the floor X. During such adjustment of the leg bracket 14, it will turn l about the axis of tie-rod 21.

The above described joint will permit all lt'our of the legs 15 to securely rest on the floor X, irrespective of the uneven condition thereof, without producing torque on the bed 10.

It will be understood that the invention described is capable of the various modifications within the scope of the invention herein disclosed and claimed.

What we claim is:

1. In a device of the class described two pairs of supporting legs, a pan connecting the two pairs of legs, a bed, a base block eX- tending transversely on the pan and supporting the bed at one end, said base block being rigidly secured to the bed and the respective pair of legs, an upper bearing eX- tending transversely on the bottom of the bed at the other end thereof and rigidly secured thereto, a lower bearing extending transversely on the pan and rigidly secured to the other pair of legs, and a rocking joint between the two bearings.

2. In a kdevice of the class described two pairs of supporting legs, a sheet metal member connecting the two pairs of legs with freedom to Hex and permit said legs to rest on an uneven surface, a bed, a base block supporting the bed at one end from one pair of said legs and rigidly secured to said bed and the respective pair of legs, an upper bearing rigidly. secured to the bed at its other end, a lower-bearing rigidly secured to the other pair of legs, and a rocking joint between the two bearings.

3. In a device of the class described two pairs of supporting legs, a sheet metal pan supported on the legs and rigidly secured thereto, said pan being free to flex between D even, without placing torque on the bed 10.

tures.

ADOLPH STORM. THOR THORSEN. 

